<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" v-for="item of hotCities" :key="item.id" @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>					
				</div>
			</div>
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" v-for="city of item" :key="city.id" @click="handleCityClick(city.name)">{{city.name}}</div>					
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import BScroll from 'better-scroll'
	import {mapState,mapMutations} from 'vuex'
	export default {
		name: 'CityList',
		props:{
			cities: Object,
			hotCities: Array,
			letter: String
		},
		computed:{
			...mapState({
				currentCity:'city'
			})
		},
		methods:{
			handleCityClick(city){
				// this.$store.dispatch('changeCity',city)
				this.changeCity(city)
				this.$router.push('/')
			},
			...mapMutations(['changeCity'])
		},
		watch:{
			letter(){
				if(this.letter){
					const element = this.$refs[this.letter][0]
					this.scroll.scrollToElement(element)
				}
			}
		},
		mounted(){
			this.scroll = new BScroll(this.$refs.wrapper,{
				click: true
			}) //创建scroll属性，把this.$refs.wrapper传进去初始化better-scroll
		}
	}
</script>

<style lang="stylus" scoped>
	.border-topbottom
	&:before
		border-color:#ccc
	&:after:
		border-color:#ccc
	.border-bottom
	&:before
		border-color:#ccc
	.list
		position:absolute
		top:1.58rem
		left:0
		right:0
		bottom:0
		overflow:hidden
		.title
			line-height:.54rem
			background:#eee
			padding-left:.2rem
			color:#666
			font-size:.26rem
		.button-list
			overflow:hidden
			padding:.1rem .6rem .1rem .1rem
			.button-wrapper
				float:left
				width:33.33%
				.button
					margin:.1rem
					padding:.1rem 0
					text-align:center
					border:.02rem solid #ccc
					box-sizing:border-box
		.item-list
			.item
				line-height:.76rem
				padding-left:.2rem
				
</style>
